Comparison of BSA Super Rocket 1966 and Harley-Davidson Sport Twin 1920 [S]ave
| Attribute |  BSA Super Rocket 1966 × |  Harley-Davidson Sport Twin 1920 × |
|---|---|---|
| General | ||
| Production from (year) | 1966 | 1920 |
| Make | BSA | Harley-Davidson |
| Model | BSA Super Rocket | Harley-Davidson Sport Twin |
| Category | Allround | Sport |
| Engine and transmission | ||
| Engine type | Twin, four-stroke | Twin, four-stroke |
| Fuel system | Carburettor | Carburettor |
| Displacement (cm³) | 646 | 590 |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 70 | 69.9 |
| Stroke (mm) | 84 | 76.2 |
| Fuel control | Overhead Valves (OHV) | Sidevalves |
| Ignition | - | Magneto |
| Clutch | - | Three speed |
| Lubrication system | Wet sump | - |
| Compression | - | 3.8:1 |
| Chassis | ||
| Front suspension | Hydralic telescopic forks | Trailing link with single downtube |
| Rear suspension | Twin shock | Rigid |
| Front brakes | Expanding brake (drum brake) | - |
| Rear brakes | Expanding brake (drum brake) | - |
| Frame type | - | Tubular steel |
| Front tyre | - | 3-26 |
| Rear tyre | - | 3-26 |
| Dimensions | ||
| Wheelbase (mm) | 1,391 | 1,448 |
| Dry weight (kg) | 186 | 120 |
| Performance | ||
| Fuel capacity (l) | - | 10 |
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